Williamson County property record for 16516 Castletroy Dr, Austin, TX 78717
| Property Type | Single Family Home |
|---|---|
| Details | 3 ba · 2,302 sqft · built 2001 |
| Lot Size | 0.129 acres (5,639 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $544,700 (Jun 2021) |
| Tax Bill | $10,646 (2025) |
| Deeds & Mortgages | Oct 2021 Transfer Jun 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | R-16-3020-000A-0009 |
| Primary APN | R-16-3020-000A-0009 |
|---|---|
| Alternative APNs |
|
| Full Baths | 3 Baths |
|---|---|
| Stories | 2 Stories |
| Building Area | 2,302 sqft Living Area |
| 1st Floor Area | 1,210 sqft |
| 2nd Floor Area | 1,092 sqft |
| Flooring | Carpet |
| Interior Walls | Wallboard/Drywall |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 2001 |
|---|---|
| Effective Year Built | Effective 2001 |
| Exterior Material | Stone |
| Roof Material | Other |
| Lot Area | 5,639 sqft (0.129 acres) |
| Garage Area | 441 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 389 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Account Number | R163020000A0009 |
|---|---|
| Street Address | 16516 CASTLETROY DR |
| City | AUSTIN |
| State | TX |
| Zip | 78717-5524 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | S7676 - AVERY RANCH EAST PH 1, BLOCK A, LOT 9 |
| Legal Subdivision | AVERY RANCH EAST PH 1 |
| Legal Phase | 1 |
| Legal Block | A |
| Legal Lot Number | 9 |
| Jurisdiction | WILLIAMSON TX |
| Township / Civil Division | ROUND ROCK-GEORGETOWN |
| Census Block Group | 4 |
| Census Block | 4008 |
| Census Tract | 20509 |
16516 Castletroy Dr is owned by two individuals who acquired it in October 2021.
Source: Williamson County records, as of September 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 132 HOMBEAM TER, SUNNYVALE, CA 94086 |
| Owner Type | Individual |
| Vesting | Individual(s) |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Oct 4, 2021 | Correction Deed CHICAGO TITLE/TX LLC, CHICAGO TITLE OF TEXAS LLC |
| Jun 25, 2021 | Vendor's Lien, Transfer · Conventional Mortgage AMCAP MORTGAGE LTD |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 25, 2021 · Amount on File |
| Deed Sale | Jun 25, 2021 · Amount on File |
| Prior Sale | Feb 1, 2011 · Amount on File |
| Deed Document Number | 202194329 |
| Last Transfer Date | Oct 4, 2021 |
| Transfer Doc | 0000151906 |
| Record Updated | Oct 29, 2026 |
| Document Type | Correction Deed |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Recording Date | Oct 4, 2021 |
| Property Address | 16516 CASTLETROY DR, AUSTIN, TX 78717-5524 |
| Document Number | 0000151906 |
| Map Reference | CAB U SL 62-70 |
| Instrument Date | Oct 4, 2021 |
| Instrument | 2021151906 |
| Record Updated | Dec 29, 2021 |
| Title Company | CHICAGO TITLE/TX LLC, CHICAGO TITLE OF TEXAS LLC |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 132 HOMBEAM TERRACE, SUNNYVALE, CA 94086 |
| Document Type | Vendor's Lien |
|---|---|
| Jurisdiction | WILLIAMSON TX |
| Recording Date | Jun 25, 2021 |
| Property Address | 16516 CASTLETROY DR, AUSTIN, TX 78717-5524 |
| Document Number | 0000094329 |
| Map Reference | CAB U SL 62-70 |
| Instrument Date | Jun 24, 2021 |
| Instrument | 2021094329 |
| Transaction Type | Transfer |
| Record Updated | Dec 29, 2021 |
| Title Company | E-CHICAGO TITLE, CHICAGO TITLE |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 132 HORNBEAM TER, SUNNYVALE, CA 94086-7045 |
| Document Number | 0000094330 |
|---|---|
| Date | Jun 25, 2021 |
| Instrument | 2021094330 |
| Name | AMCAP MORTGAGE LTD |
|---|---|
| Type | Mortgage Company |
| Special Notes | Seller Financed |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jul 1, 2051 |
The 2025 property tax bill for 16516 Castletroy Dr was $10,646, up 5.1% from the year before.
Source: Williamson County assessment roll, as of September 11, 2026
| Type | Name |
|---|---|
| State | Texas |
| Municipality | Austin City |
| County | Williamson County |
| Unified School District | Round Rock Independent School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $10,646.00 (+5.11%) | $524,962 Land $106,000 Building $418,962 | $524,962 Land $106,000 Building $418,962 |
| 2024 | $10,128.00 (+3.63%) | ||
| 2023 | $9,773.00 (-21.52%) | $517,162 Land $115,000 Building $402,162 | $517,162 Land $115,000 Building $402,162 |
| 2022 | $12,453.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 16516 Castletroy Dr in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective October 5, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 3 in force |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 16516 Castletroy Dr is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.8% of the US · lower than 99.8% of Texas |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | CITY OF AUSTIN WATER & WASTEWATER serves 1,115,323 people · EPA ID TX2270001 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jul 2023 |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | Turbidity resolved · Feb 2022 |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 489 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| Google Fiber Fiber | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Astound Broadband, VTX Communications, Western Broadband.
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